论文标题
$ \ Mathbf {B_C} $ Mesons的光谱和找到异国情调$ \ Mathbf {B_C} $的可能性 - 喜欢结构
Spectroscopy of $\mathbf{B_c}$ mesons and the possibility of finding exotic $\mathbf{B_c}$-like structures
论文作者
论文摘要
底部的（$ b_c $）的介子比其charmonium（$ c \ bar c $）和底部（$ b \ bar b $）合作伙伴更稳定，因为它们不能歼灭成glu。但是，避免了低产量的横截面和信噪比的比率到现在为止。 CMS和LHCB在CERN报道的最新实验结果打开了$ b_c $频谱与Charmonium和Bottomonium一样完整的可能性。受到这种期望的激励，我们计算了打开衰减的梅森 - 梅森阈值的区域能量中的底部梅森群众，在$ b_c $ spectroscopy中寻找对$ x（3872）$的类似物。我们使用一个组成夸克模型，其中夸克 - 易夸克的自由度与四体Fock状态配置相辅相成。该模型已应用于广泛的Hadronic可观测值，尤其是$ x（3872）$，因此模型参数被完全限制。在$ j^p = 0^+$和$ j^p = 1^+$部门中找不到额外的状态。但是，在$ j^p = 2^+$行业中，我们发现一个非常接近$ d^*b^*$阈值的状态，可以实验检测到。
The bottom-charmed ($B_c$) mesons are more stable than their charmonium ($c\bar c$) and bottomium ($b\bar b$) partners because they cannot annihilate into gluons. However, the low production cross-sections and signal-to-background ratios avoided until now their clear identification. The recent experimental results reported by CMS and LHCb at CERN open the possibility of having a $B_c$ spectrum as complete as the ones of charmonium and bottomonium. Motivated by this expectation, we compute bottom-charmed meson masses in the region energies in which decay meson-meson thresholds are opened, looking for the analogs to the $X(3872)$ in the $B_c$ spectroscopy. We use a constituent quark model in which quark-antiquark degrees of freedom are complemented by four-body Fock states configurations. The model has been applied to a wide range of hadronic observables, in particular to the $X(3872)$, and thus the model parameters are completely constrained. No extra states are found in the $J^P=0^+$ and $J^P=1^+$ sectors. However, in the $J^P=2^+$ sector we found an additional state very close to the $D^*B^*$ threshold which could be experimentally detected.
